ActiveSupport typo fixes.

activesupport/test/dependencies_test.rb

@@ -841,7 +841,7 @@ def test_unloadable_constants_should_receive_callback
     remove_constants(:C)
   end
 
-  def test_new_contants_in_without_constants
+  def test_new_constants_in_without_constants
     assert_equal [], (ActiveSupport::Dependencies.new_constants_in(Object) { })
     assert ActiveSupport::Dependencies.constant_watch_stack.all? { |k, v| v.empty? }
   end

activesupport/test/hash_with_indifferent_access_test.rb

@@ -486,7 +486,7 @@ def test_indifferent_to_hash
     assert_equal @strings, roundtrip
     assert_equal "1234", roundtrip.default
 
-    # Ensure nested hashes are not HashWithIndiffereneAccess
+    # Ensure nested hashes are not HashWithIndifferentAccess
     new_to_hash = @nested_mixed.with_indifferent_access.to_hash
     assert_not new_to_hash.instance_of?(HashWithIndifferentAccess)
     assert_not new_to_hash["a"].instance_of?(HashWithIndifferentAccess)

activesupport/test/notifications_test.rb

@@ -81,7 +81,7 @@ def test_subscribed
       assert_equal expected, events
     end
 
-    def test_subsribing_to_instrumentation_while_inside_it
+    def test_subscribing_to_instrumentation_while_inside_it
       # the repro requires that there are no evented subscribers for the "foo" event,
       # so we have to duplicate some of the setup code
       old_notifier = ActiveSupport::Notifications.notifier

activesupport/test/safe_buffer_test.rb

@@ -151,7 +151,7 @@ def test_titleize
     assert_equal "", ActiveSupport::SafeBuffer.new("foo").clone_empty
   end
 
-  test "clone_empty keeps the original dirtyness" do
+  test "clone_empty keeps the original dirtiness" do
     assert_predicate @buffer.clone_empty, :html_safe?
     assert_not_predicate @buffer.gsub!("", "").clone_empty, :html_safe?
   end

activesupport/test/share_lock_test.rb

@@ -38,7 +38,7 @@ def test_exclusive_blocks_sharing
     end
   end
 
-  def test_multiple_exlusives_are_able_to_progress
+  def test_multiple_exclusives_are_able_to_progress
     with_thread_waiting_in_lock_section(:sharing) do |sharing_thread_release_latch|
       exclusive_threads = (1..2).map do
         Thread.new do

activesupport/test/time_travel_test.rb

@@ -148,7 +148,7 @@ def test_time_helper_travel_to_with_subsequent_calls
     end
   end
 
-  def test_travel_to_will_reset_the_usec_to_avoid_mysql_rouding
+  def test_travel_to_will_reset_the_usec_to_avoid_mysql_rounding
     Time.stub(:now, Time.now) do
       travel_to Time.utc(2014, 10, 10, 10, 10, 50, 999999) do
         assert_equal 50, Time.now.sec

activesupport/test/time_zone_test.rb

@@ -32,7 +32,7 @@ def test_period_for_local
     end
   end
 
-  def test_period_for_local_with_ambigiuous_time
+  def test_period_for_local_with_ambiguous_time
     zone = ActiveSupport::TimeZone["Moscow"]
     period = zone.period_for_local(Time.utc(2015, 1, 1))
     assert_equal period, zone.period_for_local(Time.utc(2014, 10, 26, 1, 0, 0))